1 person found this helpful
Make some radical adjustments to the top layer's effect settings. If they don't make changes in the track matte then you'll have to pre-compose the layer moving attributes to the new comp.
If that doesn't give the look you want try applying roughen edges to the white solid.
Sorry, could I change my mind as to what I want. I'm really sorry.
THIS IS IT:
-I want visibility at a single point to be either 100 or 0 for my White Solid.
-The thing that determines this shall be the luma-track-matte.
-The threshold brightness value I will define the value below which the White Solid is invisible at that point
-I want the threshold brightness value to INCREASE towards the edges of the rectangle.
How can I do this?
There are a bunch of ways you can clip the color values. The easiest would be to apply Effect>Stylize>Threshold to the top layer. You can also use Levels, curves, Levels individual controls, posterize, even Arithmetic (it's under the Chanel section). Please let me know if this produces the kind of effect you're after.